[PYTHON] Project Euler 17

problem

If you write the numbers from 1 to 5 in English words, they are one, two, three, four, five, and the total number of letters 3 + 3 + 5 + 4 + 4 = 19 is used.

Then, if you write all the numbers from 1 to 1000 (one thousand) in English words, how many letters will be in total?

Note: Do not count whitespace or hyphens. For example, 342 (three hundred and forty-two) counts as 23 characters and 115 (one hundred and fifteen) counts as 20 characters. Note that "and" is used in the United Kingdom. Custom. http://odz.sakura.ne.jp/projecteuler/index.php?cmd=read&page=Problem%2017

Answer

It's extremely annoying.

def get_x(num):
  x=num%10
  L1 = ['', 'one','two','three','four','five','six','seven','eight','nine']
  return L1[x]

def get_xx(num):
  L2 = ['']*10+['ten','eleven','twelve','thirteen','fourteen','fifteen','sixteen','seventeen','eighteen','nineteen']
  L3 = ['','','twenty','thirty','forty','fifty','sixty','seventy','eighty','ninety']
  
  xx = num % 100
  if xx < 10:
    return get_x(xx)
  elif xx < 20:
    return L2[xx]
  else:
    return L3[xx//10] + get_x(xx)

def get_xxx(num):
  xxx = num//100
  xx = num%100
  
  if xxx:
    if xx:
      return get_x(xxx)+'hundredand'+get_xx(xx)
    else:
      return get_x(xxx)+'hundred'
  else:
    return get_xx(xx)

def get_xxxx(num):
  if num == 1000:
    return 'onethousand'
  else:
    return get_xxx(num)

def main():
  s = ''
  for i in range(1,1001):
    s += get_xxxx(i)
  print len(s)

main()